wen · guest · Physics

01 During a one-minute revision round: After three half-lives, the undecayed fraction is

A \(1/3\) This does not satisfy the stated relationship.

B \(1/8\) \((1/2)^3=1/8\).

C \(3/8\) This does not satisfy the stated relationship.

D \(1/6\) This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Half-life · answered at 3933 ms

02 After three half-lives, the undecayed fraction is

A \(1/6\) This does not satisfy the stated relationship.

B \(1/3\) This does not satisfy the stated relationship.

C \(3/8\) This does not satisfy the stated relationship.

D \(1/8\) \((1/2)^3=1/8\).

Written for icaijy.com · U1 · Half-life · answered at 7431 ms

03 During a one-minute revision round: Convection transfers energy mainly through

A bulk motion of a fluid Warmer fluid moves and carries internal energy.

B nuclear decay This does not satisfy the stated relationship.

C electron flow in a vacuum This does not satisfy the stated relationship.

D electromagnetic waves only This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Heat transfer · answered at 13799 ms

04 Which response best completes this VCE-style item? Refraction occurs because light

A changes speed between media A speed change produces a direction change except at normal incidence.

B loses all energy This does not satisfy the stated relationship.

C becomes charged This does not satisfy the stated relationship.

D changes frequency at the boundary This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Light · answered at 16883 ms

05 Which response best completes this VCE-style item? The gradient of a displacement–time graph gives

A force This does not satisfy the stated relationship.

B acceleration This does not satisfy the stated relationship.

C momentum This does not satisfy the stated relationship.

D velocity Velocity is the rate of change of displacement.

Written for icaijy.com · U2 · Motion · answered at 20533 ms

06 A student is checking a worked solution. The area under a velocity–time graph gives

A force This does not satisfy the stated relationship.

B displacement Integrating velocity over time gives displacement.

C acceleration This does not satisfy the stated relationship.

D power This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Motion · answered at 23017 ms

07 Which response best completes this VCE-style item? Wave frequency is determined by the

A observer’s clock only This does not satisfy the stated relationship.

B medium alone This does not satisfy the stated relationship.

C amplitude This does not satisfy the stated relationship.

D source The source sets the oscillation frequency.

Written for icaijy.com · U2 · Waves · answered at 27966 ms

08 Which response best completes this VCE-style item? Beta-minus decay converts a neutron into

A an alpha particle This does not satisfy the stated relationship.

B two neutrons This does not satisfy the stated relationship.

C a photon only This does not satisfy the stated relationship.

D a proton, electron and antineutrino Charge and lepton number are conserved.

Written for icaijy.com · U1 · Nuclear physics · answered at 34182 ms

09 Which response best completes this VCE-style item? Two components connected in parallel have the same

A potential difference Both ends connect to the same two nodes.

B resistance This does not satisfy the stated relationship.

C current in every branch This does not satisfy the stated relationship.

D power This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Circuits · answered at 38616 ms

10 A student is checking a worked solution. Conventional current in an external circuit is opposite to the drift of

A neutrons This does not satisfy the stated relationship.

B electrons Electrons carry charge opposite to conventional-current direction.

C photons This does not satisfy the stated relationship.

D positive ions in a metal lattice This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Electricity · answered at 43366 ms

11 During a one-minute revision round: The gradient of a displacement–time graph gives

A velocity Velocity is the rate of change of displacement.

B acceleration This does not satisfy the stated relationship.

C momentum This does not satisfy the stated relationship.

D force This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Motion · answered at 47450 ms

12 Which response best completes this VCE-style item? An alpha particle contains

A one electron This does not satisfy the stated relationship.

B two photons This does not satisfy the stated relationship.

C two protons and two neutrons It is a helium-4 nucleus.

D one proton and one neutron This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Nuclear physics · answered at 50118 ms

13 A student is checking a worked solution. The independent variable is the quantity that is

A deliberately changed It is manipulated to test its effect.

B measured as the outcome This does not satisfy the stated relationship.

C ignored This does not satisfy the stated relationship.

D kept constant This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Experimental design · answered at 54766 ms

14 During a one-minute revision round: Two components connected in parallel have the same

A resistance This does not satisfy the stated relationship.

B potential difference Both ends connect to the same two nodes.

C power This does not satisfy the stated relationship.

D current in every branch This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Circuits · answered at 58749 ms

15 Which response best completes this VCE-style item? When a wave enters a new medium, its frequency usually

A must double This does not satisfy the stated relationship.

B changes in inverse proportion to amplitude This does not satisfy the stated relationship.

C becomes zero This does not satisfy the stated relationship.

D remains constant The boundary changes speed and wavelength, not source frequency.

Written for icaijy.com · U2 · Waves · not answered before time expired